If you connect rechargeable batteries in parallel and one is discharged while the others are charged the charged batteries will attempt to charge the discharged battery. Take another set of batteries and wire them together in parallel as well.
Mixing Parallel 18650 Batteries Batteries Power Forum
Mixing batteries in parallel. According to safety materials from the oak ridge national laboratory mixing old and new batteries or different brands of batteries that have different performance levels causes the stronger. Its common in many rvs to make use of pairs of 6v deep cycle batteries wired in series. Unlike wiring batteries in series when batteries are wired in parallel the voltage does not increase the output voltage is the average voltage of all batteries in the circuit. For example if a 3v and a 9v battery were wired in parallel the output voltage would be 6v 93 divided by 2 however the current will be total amperage of all. With no resistance to slow this charging process the charged units can overheat as they rapidly drain and the discharged battery can overheat as it attempts to charge at well above its design capabilities. When you connect two or more batteries that dont charge and discharge at the same rate one battery will probably end up overcharged andor one battery will end up undercharged.
Finally take a jumper wire and bridge the positive terminal of one parallel connection to the negative terminal of the second parallel battery pair. Take two batteries and connect them in parallel. Neither is a scenario you want to have happen to your batteries as it will probably shorten the lifespan of both and could create a potentially create a dangerous situation if one battery gets severely overcharged. You can connect your load to one of the batteries and it will drain both equally. Mixing batteries in series. To join batteries in parallel use a jumper wire to connect both the positive terminals and another jumper wire to connect both the negative terminals of both batteries to each other.
In a pair of 6v batteries in series the voltages of each are not guaranteed to be the same as they are when wired in parallel. Negative to negative and positive to positive.
Gallery of Mixing Batteries In Parallel
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